Machines for making corrugated paper board



1955 T. ROWLANDS MACHINES FOR MAKING CORRUGATED PAPER BOARD Filed May 25, 1955 I 2 Sheets-Sheet l Aug. 2, 1955 T. ROWLANDS 2,714,415

MACHINES FOR MAKING CORRUGATED PAPER BOARD Filed May 25, 1953 2 Sheets-Sheet 2 United States Patent Ofiice 2,714,415 MACHINES FOR MAKING CORRUGATED PAPER BOARD Tom Rowlands, Deptford, London, England, assignor to Molins Machine Company Limited, London, England, a British company Application May 25, 1953, Serial No. 357,169 Claims priority, application Great Britain March 9, 1953 Claims. (Cl. 154-30) This invention concerns improvements in or relating to machines for making corrugated paper board.

In United States patent application Serial No. 294,028, filed June 17, 1952, there is disclosed in apparatus for making corrugated board in which a guide member (e. g. a stripper) is arranged to guide a corrugated web to which liquid adhesive (e. g. an alkali silicate such as sodium silicate) has been applied, means to cool a part at least of the guide memberso as to maintain the temperature of the said part at a lower level than that of the atmosphere immediately around it.

The means described and illustrated by way of example in the specification and drawings of the application referred to comprise an enclosed conduit extending along each stripper, through which conduit a cooling fluid such as cold water is circulated. In one construction described, the conduits were formed by tubes in contact with the sides of the strippers, and in another construction the conduits are formed by long narrow slots formed in the strippers and closed at their sides by thin plates.

The purpose of cooling the strippers was to reduce the tendency for adhesive to build up on the strippers.

According to the present invention there is provided in apparatus for making corrugated board in which a guide member (e. g. a stripper) is arranged to guide a corrugated web to which liquid adhesive (e. g. an alkali silicate such as sodium silicate) has been applied, means to cool a part at least of the guide member so as to maintain the temperature of the said part at a lower level than that of the atmosphere immediately around it, said means comprising an enclosed conduit through which a stream of cooling fluid (e. g. cold water) can be passed, said conduit constituting a support uponwhich the said part is mounted so as to be cooled.

The said conduit may constitute a support for a plurality of guide members, in which case the conduit may be arranged to extend transversely of the guide members.

The part of a guide member which is mounted on the said conduit may be separate from the rest of the guide member, the said separate part being that part of the guide member which engages paper to which adhesive has; been applied and which therefore tends to become coated with adhesive.

Apparatus according to the invention will now be described by way of example with reference to the accompanying drawings, in which:

Figure 1 is a view, partly broken away, rugating roller and strippers mounted on a and Figure 2 is a view, A-A in Figure 1. a

A paper web is passed between a corrugating roller 1 and a further corrugating roller (not shown) and thereby has corrugations formed in it. The corrugated web is guided and retained in the flutes of the roller 1 by guide members or strippers which are arranged across the length of the roller 1 side by side. Each stripper consists of two separate parts 2 and 3, arranged end to end as seen in Figure 2.

An adhesive-applying roller 4 applies adhesive to the showing a corcold water pipe,

partly in section, taken on the line tips of the corrugations in the web, and it will be seen from Figure 2 the two parts 2 that this occurs at the position at which and 3 of the strippers adjoin. The part 3 therefore guides corrugated paper to which adhesive has been applied. As explained in the earlier specification referred to above, this part tends to become coated with liquid adhesive (the most generally used at the present time being alkali silicate) which dries on that part of the stripper and builds up in a hard mass, and this tendency is reduced or avoided by continuously cooling the stripper while the machine is operated.

For this purpose the parts 3 are mounted on a pipe 5 which acts as a conduit for a stream of cold water which is passed through the pipe by an inlet 6 and an outlet 7. The parts 3 fit in slots in the upper portions of holders 8 and project through the slots into shallow grooves 9 formed in the pipe 4. The parts 3 are clamped in the holders 8 by bolts 10, and the lower portions of the holders are split as shown in Figure 2 and are clamped on the pipe 4 by screws 11.

The pipe 4 is supported at its ends in brackets 12, and as it is of considerable length it is supported midway or at suitable positions along its length by one or more adjustable supports 13.

The present arrangement has the advantage that a single conduitnamely the pipe 5-can be used to cool all the strippers, instead of an individual conduit for each stripper as in the construction described in the earlier application referred to, thus providing a simpler and cheaper arrangement than in the earlier case. Moreover the pipe 5 and the pipes for supplying liquid to it and carrying the liquid away from it can be of relatively large diameterfor example the pipe 5 in the example illustrated has an internal diameter of 1 /2 incheswhereas in the earlier case the conduits formed in or on the strippers are of necessity of very small cross-section and are therefore more likely to become blocked by dirt or foreign bodies than is the conduit in the present case.

What I claim as my invention and desire to secure by Letters Patent is:

1. In apparatus for making corrugated board, means to convey a corrugated web of material, means to apply liquid adhesive to said corrugated web, a guide member to engage and guide said web, part at least of said guide member being arranged to engage a portion of said web to which adhesive has been applied, a conduit constituting a support on which said part of said guide member is mounted, and means to pass a stream of cooling fluid through the said conduit so as to cause said part to be cooled.

2. Apparatus as claimed in claim 1, wherein the said part is mounted in contact with the said conduit.

3. Apparatus as claimed in claim 1, wherein the said conduit constitutes a support for a plurality of guide members and is arranged to extend transversely of the guide members.

4. Apparatus as claimed in claim 1 wherein the part of a guide member which is mounted on said conduit is separate from the rest of the guide member, the said separate part being that part of the guide member which engages paper to which adhesive has been applied and which therefore tends to become coated with adhesive.

5. For use in apparatus for making corrugated board, of the type comprising a corrugating roller and means to apply adhesive to a-web of corrugated board carried on said roller, the combination with a stripper to engage and guide a portion of said web to which adhesive has been applied, of a conduit through which a cooling fluid can be passed to cool the stripper, said stripper being mounted on and in contact with said conduit.

References Cited in the file of this patent UNITED STATES PATENTS Aug. 18, 1936 

